audio question...

I have a dell Latitude D610 and I want to use a mixing software to begin DJing.... I need to play the music out loud on my PC speakers and also use channel 2 on the mixing program for my headphones. I bought a USB to audio cable so i can plug both my speakers and headphones into.

It doesnt work anyway, the music comes out of only one, the speakes (left and right to mix) and same as headphones.

The "USB to audio cable" functions as a second sound card, therefore you'll need to configure whatever application you're playing the music in to output to both sound cards, most "DJ-ing" applications should be able to do this AFAIK.

I've registered because of problem. So I'm asking you, because I've seen here many smart and good people to help me to understand this correctly.
I am From Germany
Nice day is it today, but I have a question for all...